Your viewpoint is always that "do" can be used in casual English, but should not be Utilized in official sort English. Suitable? I did nothing of the type. I advise you examine my article once more. Loob maintains that "I did my French exam very last week" is ok. http://keeganvbfhj.isblog.net/hire-someone-to-do-my-exam-fundamentals-explained-14749399